Your amoxicillin has 250 mg per 5 ml, wich means each ml has 50 mg.
The dose I would use is 125 mg/kg and the math for that is:
Weigh in pounds, divide by 2.2, times 125, divide by 50
One pound:
1 / 2.2 x 125 /50 = 1.14 ml twice a day for 7-10 days
Does that help?